625551791716 has 12 divisors (see below), whose sum is σ = 1094740948588. Its totient is φ = 312768663552.

The previous prime is 625551791687. The next prime is 625551791783. The reversal of 625551791716 is 617197155526.

It can be written as a sum of positive squares in 2 ways, for example, as 100355904100 + 525195887616 = 316790^2 + 724704^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1611081 + ... + 1961296.

Almost surely, 2^625551791716 is an apocalyptic number.

It is an amenable number.

625551791716 is a deficient number, since it is larger than the sum of its proper divisors (469189156872).

625551791716 is a wasteful number, since it uses less digits than its factorization.

625551791716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616158 (or 3616156 counting only the distinct ones).

The product of its digits is 3969000, while the sum is 55.

The spelling of 625551791716 in words is "six hundred twenty-five billion, five hundred fifty-one million, seven hundred ninety-one thousand, seven hundred sixteen".